Features:

– Ideal for controlling direct-acting and pilot-operated proportional pressure control valves without electrical position feedback

– Differential Inputs

– Additional command value input, 0 to +9 V

– Ramp generator with separately adjustable rising and falling ramps

– Clock current output stage

– Clock Current Output Stage Reverse Voltage Supply Polarity Protection

– Short circuit protection

Function Description

The command value voltage can be applied to command value input 1 directly or via an external command value potentiometer using the regulated voltage of + 9 V of the power supply unit [8].

For this input the following conditions are valid: + 9 V = + 100 % 1).

Command value input 2 is a differential input [1] (0 to + 10 V). This input must be used if the command value is fed forward from an external electronic device with another reference potential (e.g. from the PLC).

This input must be used. When cutting in or out the command value voltage, take care to connect the two signal lines to or disconnect them from the input.

Prior to transmission, the two command values are summed [2] and fed to the potentiometer [3], which is available on the front panel of the card and is used as an attenuator to limit the maximum command value.